.app{
	width: 100%;
	height: 100vh;
	background-color: #ffffff;
	position: relative;
	display: flex;
	justify-content: center;
	align-items: center;
}
.btn15{
	width: 140px;
	height: 48px;
	line-height: 48px;
	background-color: #eee;
	border: none;
	border-radius: 24px;
	font-size: 16px;
	color: #333333;
	text-align: center;
	transition: all 0.24s linear;
}
.btn15:hover{
	cursor: pointer;
	color: #fff;
	background-color: #253ed2;
	animation: yizhidong 0.24s linear infinite;
}
@keyframes yizhidong{
 0%{
  transform: translate(0);
 }
 20%{
  transform: translate(-3px, 3px);
 }
 40%{
  transform: translate(-2px, -3px);
 }
 60%{
  transform: translate(3px, 2px);
 }
 80%{
  transform: translate(2px, -3px);
 }
 100%{
  transform: translate(0);
 }
}
